Truck-bolster.



G. T. JOHNS6N'& H. W. STERTZBACH.

TRUCK BGLSTER.

APPLICATION FILED 211.25, 1914 IN VEN T 0R5 Al lnmey Patented June 23,1914.

2' SHEETSSHEET 1.

G. T. JOHNSON & H. STERTZBACH. TRUCK BOLS'RgR. APPLICATION mum rim/2s,1914.

q Attorney UNITED, STATES PATENT OFFICE.

GEORGE '1. JOHNSON AND HARRY W. STERTZBACH, OF COLUMBUS, OHIO, ASSIGNORSTO THE BUCKEYE STEEL CASTINGS COMPANY, OF COLUMBUS, OHIO.

TBUCK-BOISTEB.

Specification of Letters Patent.

Patented June 23, 1914.

Application filed February 28, 1914. Serial No. 821,753.

To all whom it may concern Be it known that we, GEORGE T. Jon) SON andIIARRY W. STERTZBACH, of Columbus, in the county of Franklin and Stateof Ohio, have invented certain new and useful Im- 1 ovements inTruck-Bolsters; and we do iereoy declare the following to be a full,clear, and exact description of the invention, such as will enable:others skilled in the art to which it appertains to make and use thesome.

Our invention relates to an improvement in truckbolsters and is animprovement on the construction disclosed in Patent No. 776,046 grantedto Samuel P. Bush, Novemher 29th, 1904.

The construction disclosed in the patent above referred to, consists ofa top plate or compression member and a bottom plate or tension member,spaced the greatest distance apart at their centers where they areconnected by a. strut, and the lower member having an a preciablygreater incline than the tepmem er. The compression and tension membersare also connected by the in tegral side members, which latter are providcd with central openings, and the top member is provided with acenter bearing.

Our invention consists in providing a bolster as above described, withrecessed seats adjacent the ends of the compression member in which theside bearings are secured, and the tension member with or withoutrecesses for roll-er bearings.

Our invention further consists in a bolster the compression member ofwhic is provided with recessed seats for the side bearings and areinforcing body of metal integral with said top member and projectinginto each recess. 1

Cur invention further consists in a bolster omposed of compression andtension memers and provided with recessed seats and reinforcing columnslocated immediately under seats and connecting the top and hottommembers.

In the accompanying drawings, Figure 1 a view in side elevation of abolster embodying our invention; Fig. 2 is a view in top plan of onehalf of the bolster; Fig. 3 is a bottom plan of same; Fig. 4 is a viewin section through, the tension member at one end showing the recessesfor the hear: ing roller; Fig. 5 is a view in section on the line a: a:of Fig. 2, Fig. 6 is a view in section on the line 3 g of Fig. 2, andFig. 7 is a view in section showing the side bearing in place but notbolted or riveted to the bolster.

1 represents the top plate or compression member, and 2 the bottom plateor tension member connected by the side members 3 and by the strut 4,all cast integral. The top or compression member 1 is provided adjacentits ends with the recessed seats 5, the walls of which recesses conformin contour, to the contour of the base (i of the side bearings 6 whichlatter rest within said depressed seats. \Ve make theseside bearingseats with a centrally located projection 7 at one side, and a centrallylocated recess 8 at the opposite side in the plane of the projectingpart 7, so that the part of the bolster entering and filling said recessin tho side bearings constitute in effect a reinforcing body of metalprojecting into the recessed seat for the side bearing from theoutermost limits of the latter. Y

The lower or tension member is provided adjacent its two ends withdepressed seats or bearings 9, there being in the present instance threedepressions, for three rollers at each end of the holster.

The vertical space within the truck for the bolster ends is necessarilylimited. The enforced limitation in the thickness of the bolster endsnecessarily detracts from its strength, and this thickness is furtherdecreased by the recesses in the tension member for the roller bearings,and by the recesses in the compression member for the side bearings. Itis cssentia-l in designing a bolster. to have it as nearly as possibleof uniform strength from one end to the other, and while there is ampleopportunity to provide for all stresses in the main body of the bolster,it is more dii'licult to take care of them at the ends, and particularlyso in this special type having recesses in both the compression andtension members. In order to secure such a disposition of the metalwithin the limited space at the ends as will take care of the stresses,we construct the re- 7 pass through both the upper and lower member: 1and 2 and through columns 11 integral with said members, as shown inFig. 5, the strength of the bolster is increased sufficiently tocompensate for all reduction in depth caused by the recesses.

Having fully described our invention What We claim as new and desire tosecure by Letters-Patent, is

1. A car bolster consisting of a top member and a bottom memberconnected at their ends, the top member having a recessed seat on itsupper face near each end to receive a side bearing, and the bottommember provided on its outer face adjacent each end with recesses toreceiveroller bearings 2. A car bolster consisting of a top memher and abottom member connected at their ends, the top member having a recessedseat in its upper face near each end to receive a side bearing and areinforcing body of metal integral with said top member and projectinginto each recessed seat from the outermost limits of the latter.

3. A car bolster consisting of a top member and a bottom memberconnected at their ends, the top member having a recessed seat in itsupper face near each end to receive a side bearing and a reinforcingbody of metal integral with said top member and projecting into eachrecessed seat from the outer limits of the same, the bottom member beingprovided on its outer face adjacent each end with recesses toreceiveroller bearings.

4. A car boistcr consisting of a top member anda b-"ttom memberconnected at their ends,tlie top member having a recessed seat in itsupper face near each end to receive a.

side bearing, and a reinforcing body of metal for each recessed seat,the said body being integral with the to member and projecting into eachrecesse scat centrally of the bolster, the bottom member being providedon its outer face adjacent each end with recesses for roller bearings.

5. A car bolster consisting of a top member and a bottom memberconnected at their ends, the top member having a recessed seat in itsupper face near each end to re ceive a side bearing, and reinforcingcolumns located immediately under said seats and connecting the top andbottom members and provided with bolt holes which extend through saidmember and columns.

6. A car bolster consisting of a top mem ber and a bottom memberconnected at their ends, the top member having a recessed seat in itsupper face near each end to receive a side bearing, reinforcing columnslocated immediately under said seats and connecting the top and bottommembers and provided with belt holes which extend through said memberand columns, the lowbr mem ber bein provided on its outer face withrecesses E01 roller bearings.

In testimony whereof, we have signed this specification in the presenceof two subscribing witnesses.

GEORGE T. JOHNSON. HARRY W. STEBTZBACH.

